Kinetics of the acoustic resonances in nonlinear-optical crystals during the interaction with the single-mode high-power laser radiation

Abstract

Resonant acoustic spectroscopy is applied for determination of KTP crystal optical absorption coefficient α at the λ=1.064 μm. Kinetics of the KTP crystal different resonant acoustical modes under high-power laser radiation influence were measured. We suppose that the discrepancy α values obtained is due to acoustical resonances sensitivity to inhomogeneous heating. Resonant acoustic spectroscopy can probably enable a determination of the inhomogeneous crystal temperature distribution.